CN109565844B

CN109565844B - User equipment, base station and wireless communication method

Info

Publication number: CN109565844B
Application number: CN201680088378.9A
Authority: CN
Inventors: 夏小涵; 王立磊; 铃木秀俊; P.巴苏马利克; 堀内绫子
Original assignee: Panasonic Intellectual Property Corp of America
Current assignee: Panasonic Intellectual Property Corp of America
Priority date: 2016-09-29
Filing date: 2016-09-29
Publication date: 2023-06-20
Anticipated expiration: 2036-09-29
Also published as: CN109565844A; WO2018058455A1; US11515991B2; JP6912556B2; US20210281386A1; JP2019533328A

Abstract

User equipment, base stations, and wireless communication methods related to interference reporting in full duplex operation are provided. The user equipment comprises: circuitry forming interference information about interference from at least one of the user equipment itself and at least one neighboring user equipment of the user equipment; and a transmitting unit transmitting the interference information to the base station, wherein a full duplex operation is performed between the user equipment and at least the base station.

Description

User equipment, base station and wireless communication method

Technical Field

The present disclosure relates to the field of wireless communications, and more particularly, to a User Equipment (UE), a base station, and a wireless communication method related to interference reporting in full duplex operation.

Background

Full duplex is a further study in 3GPP (third generation partnership project) and means that DL (downlink) and UL (uplink) channels can be transmitted in the same time/frequency resources. Full duplex is considered a desirable feature in NR (new radio access technology)/5G because it can greatly improve spectral efficiency (ideally 2 times). Specifically, to facilitate understanding of the concept of full duplex in NR, fig. 1 schematically illustrates three cases for comparison: (a) FDD (frequency division duplex) LTE (long term evolution); (B) TDD (time division duplex) LTE; and (C) full duplex in NR. As shown in fig. 1 (a) - (C), the horizontal axis indicated by T represents the time domain, and the vertical axis indicated by F represents the frequency domain. As can be seen from fig. 1 (a) - (B), in FDD LTE, DL and UL channels use different frequency resources on the same time resources, while in TDD LTE, DL and UL channels use different time resources on the same frequency carrier. In contrast, as shown in fig. 1 (C), in full duplex, DL and UL channels are in the same PRB (physical resource block), i.e., use the same physical (i.e., time/frequency) resources. Thus, full duplex can improve spectral efficiency to a large extent, for example, ideally 100%, compared to traditional FDD and TDD.

Disclosure of Invention

One non-limiting and exemplary embodiment provides a method of reducing interference to a reference signal in full duplex.

In a first general aspect of the present disclosure, there is provided a user equipment comprising: circuitry forming interference information about interference from at least one of the user equipment itself and at least one neighboring user equipment of the user equipment; and a transmitting unit transmitting the interference information to the base station, wherein a full duplex operation is performed between the user equipment and at least the base station.

In a second general aspect of the present disclosure, there is provided a base station comprising: a receiving unit that receives interference information from a user equipment, wherein the interference information is about interference from at least one of the user equipment itself and at least one neighboring user equipment of the user equipment; and circuitry to perform scheduling based on the interference information, wherein full duplex operation is performed between the user equipment and at least the base station.

In a third general aspect of the present disclosure, there is provided a wireless communication method for a user equipment, comprising: forming interference information about interference from at least one of the user equipment itself and at least one neighboring user equipment of the user equipment; and transmitting the interference information to the base station, wherein full duplex operation is performed between the user equipment and at least the base station.

It should be noted that general or specific embodiments may be implemented as a system, method, integrated circuit, computer program, storage medium, or any alternative combination thereof.

Additional benefits and advantages of the disclosed embodiments will become apparent from the description and drawings. Benefits and/or advantages may be obtained by the various embodiments and features of the specification and drawings individually, and these embodiments and features need not be provided all for achieving one or more of these benefits and/or advantages.

Drawings

The foregoing and other features of the present disclosure will become more fully apparent from the following description and appended claims, taken in conjunction with the accompanying drawings. Understanding that these drawings depict only several embodiments in accordance with the disclosure and are, therefore, not to be considered limiting of its scope, the disclosure will be described with additional specificity and detail through use of the accompanying drawings in which:

fig. 1 schematically illustrates three cases for comparison: (a) FDD (frequency division duplex) LTE (long term evolution); (B) TDD (time division duplex) LTE; (C) full duplex in NR;

fig. 2 schematically illustrates an example full duplex scenario in which intra-UE interference is present;

Fig. 3 schematically illustrates another example full duplex scenario in which inter-UE interference is present;

fig. 4 illustrates a flow chart of a wireless communication method for a user device in accordance with an embodiment of the present disclosure;

fig. 5 schematically illustrates an example of a frame structure of UL resource assignment in full duplex;

fig. 6 schematically illustrates an example of a frame structure of UL and DL RS assignments in full duplex;

fig. 7 illustrates a flow chart of a wireless communication method for a base station according to another embodiment of the present disclosure;

fig. 8 illustrates a block diagram of a user device according to another embodiment of the present disclosure; and

fig. 9 illustrates a block diagram of a base station according to another embodiment of the present disclosure.

Detailed Description

In the following detailed description, reference is made to the accompanying drawings, which form a part hereof. In the drawings, like numerals generally identify like components unless context indicates otherwise. It is to be readily understood that the aspects of the present disclosure can be arranged, substituted, combined, and designed in a wide variety of different configurations, all of which are explicitly contemplated and form part of this disclosure.

As shown in fig. 1 (C), since DL and UL channels use the same physical (i.e., time/frequency) resources in full duplex operation (communication), the DL and UL channels will interfere with each other. Thus, on the UE side, DL signal reception will be affected by UL signal transmissions from the UE itself or its neighboring UEs. Here, interference from the UE itself may be referred to as intra-UE interference and interference from its neighboring UEs may be referred to as inter-UE interference, and both will be discussed in detail below with reference to the accompanying drawings.

Fig. 2 schematically illustrates an example full duplex scenario in which intra-UE interference is present. As shown in fig. 2, it is assumed that full duplex operation is performed between the UE 201 and the base station 202. Specifically, the solid arrow pointing to the left indicates that UE 201 transmits UL signals to base station 202 in a full duplex physical resource scheduling unit and the open arrow pointing to the right indicates that base station 202 transmits DL signals to UE 201 in the same full duplex physical resource scheduling unit. That is, in such a full duplex physical resource scheduling unit, UL and DL transmissions are for the same UE, i.e., UE 201. In this case, UL signal transmission from the UE 201 itself will affect DL signal reception on the UE 201 side. That is, interference from the UE 201 itself, i.e., intra-UE interference, exists on the UE 201 side, as indicated by the thick dashed arrow in fig. 2.

It is noted that the term "full duplex physical resource scheduling unit" means a physical resource unit with which full duplex operation is scheduled. More specifically, in a full duplex physical resource scheduling unit, UL physical resources therein are scheduled for UL transmission by only one UE, while DL physical resources therein are also scheduled for DL reception by only one UE. Depending on MIMO or MU-MIMO operation, it is also possible to schedule multiple UEs in the same UL or DL physical resources. But there will be at least one DL channel and one UL channel transmitted simultaneously in the same resource unit. In one full duplex physical resource scheduling unit, UL physical resources and DL physical resources may be assigned to the same UE (as shown in fig. 2) or two different UEs (to be discussed later). The full duplex physical resource scheduling unit may be, for example, a PRB in the frequency domain or a TTI (transmission time interval) in the time domain; however, the present disclosure is not limited thereto.

As shown in fig. 2, on the UE 201 side, the received signal may include other types of interference, such as noise, inter-cell interference from base stations 203 in neighboring cells, as indicated by the thin-dashed arrow, in addition to intra-UE interference indicated by the thick-dashed arrow. The base station 202 cannot distinguish well between the interference type (e.g., inter-cell interference or intra-UE interference) and the interference level based on the current CQI (channel quality indicator) mechanism or RSRQ (reference signal received quality) or RSSI (received signal strength indicator) reports, since they both reflect only the total interference information. Furthermore, intra-UE interference cannot be measured directly by the base station 202, since it involves the circuitry environment and RF (radio frequency) components of the UE 201, which are unknown to the base station 202. Furthermore, intra-UE interference information cannot be easily and accurately obtained using the current CSI (channel state information) reporting mechanism.

Thus, the base station 202 may make an erroneous decision on the full duplex operation schedule because it does not know whether the interference is from another cell (e.g., base station 203) or from the UE 201 itself. For example, when intra-UE interference dominates, since the base station 202 is not aware, it may attempt to reduce inter-cell interference, e.g., through coordination. However, its efforts are futile and full duplex operation should be stopped instead. It is therefore important for the base station 202 to obtain knowledge about intra-UE interference from the UE 201 in full duplex operation.

Fig. 3 schematically illustrates another example full duplex scenario in which inter-UE interference is present. In fig. 3, the same elements as those in fig. 2 are denoted by the same reference numerals as those in fig. 2, for example, a base station 202 and a UE 201. The difference from fig. 2 is that there is also a UE 204 in the same cell in fig. 3 as a neighboring UE to the UE 201. Specifically, the solid arrow indicates that UE 204 transmits UL signals to base station 202 in a full duplex physical resource scheduling unit, and the open arrow indicates that base station 202 transmits DL signals to UE 201 in the same full duplex physical resource scheduling unit. That is, in such a full duplex physical resource scheduling unit, UL and DL transmissions are for two different UEs, namely UE 204 and UE 201. In this case, UL signal transmission from UE 204 will affect DL signal reception on the UE 201 side. That is, interference from the UE 204 (i.e., inter-UE interference) exists on the UE 201 side, as indicated by the dashed arrow in fig. 3.

As described above for the full duplex physical resource scheduling unit, the scenario shown in fig. 2 may be considered to correspond to one full duplex physical resource scheduling unit (e.g., one PRB or TTI) in which only UL and DL physical resources are scheduled for the UE 201, and the scenario shown in fig. 3 may be considered to correspond to another full duplex physical resource scheduling unit (e.g., another PRB or TTI) in which UL physical resources are scheduled for the UE 204 for UL signal transmission while DL physical resources are scheduled for the UE 201 for DL signal reception.

Although not shown in fig. 3, similarly, on the UE 201 side, the received signal may include other types of interference, such as noise, inter-cell interference, in addition to inter-UE interference indicated by the dashed arrow. Thus, in this case, the base station 202 cannot well distinguish between the interference type (e.g., inter-cell interference or inter-UE interference) and the interference level based on the current CQI mechanism or RSRQ or RSSI report, and cannot directly measure the inter-UE interference. Furthermore, the inter-UE interference information cannot be easily and accurately obtained using the current CSI reporting mechanism.

Thus, similar to fig. 2, in the scenario shown in fig. 3, the base station 202 may also make an erroneous decision on the full duplex operation schedule, as it does not know whether the interference is from another cell (e.g., base station 203) or from the UE 204. It is therefore also important for the base station 202 to obtain knowledge about inter-UE interference from the UE 204 in full duplex operation.

In an embodiment of the present disclosure, a wireless communication method 40 for a user equipment as shown in fig. 4 is provided. Fig. 4 illustrates a flow chart of a wireless communication method 40 for a user device in accordance with an embodiment of the present disclosure.

As shown in fig. 4, the wireless communication method 40 starts in step S401, wherein interference information about interference from at least one of the user equipment itself and at least one neighboring user equipment of the user equipment is formed. Then, in step S402, interference information is transmitted to the base station. After step S402, the wireless communication method 40 ends.

In the wireless communication method 40, full duplex operation is performed between the user equipment and at least the base station. That is, the wireless communication method 40 is applied to a full duplex scenario.

For example, the user equipment may be UE 201 in fig. 2 and 3. More specifically, for the scenario as shown in fig. 2, with the wireless communication method 40 as shown in fig. 4, the UE 201 can form and transmit to the base station 202 interference information about interference from the UE 201 itself, i.e., interference information about intra-UE interference. Accordingly, the base station 202 may perform scheduling based on interference information regarding intra-UE interference, thereby improving accuracy of scheduling and system performance.

Further, for the scenario as shown in fig. 3, with the wireless communication method 40 as shown in fig. 4, the UE 201 can form and transmit to the base station 202 interference information about interference from the UE 204 as its neighboring UE, i.e., interference information about inter-UE interference. Accordingly, the base station 202 may perform scheduling based on interference information regarding inter-UE interference, thereby improving accuracy of scheduling and system performance.

It is noted that the interval at which interference information is reported from the user equipment to the base station may be larger than one full duplex physical resource scheduling unit (e.g. one PRB or TTI). The full duplex operation may be different in different PRBs or TTIs. For example, assume that one reporting interval corresponds to a plurality of PRBs or TTIs, some of which correspond to the scenario shown in fig. 2, while other PRBs or TTIs correspond to the scenario shown in fig. 3. In this case, both intra-UE interference present in some PRBs or TTIs and inter-UE interference present in other PRBs or TTIs need to be reported to the base station.

Furthermore, when only intra-UE interference exists in the reporting interval, only interference information on the intra-UE interference is reported to the base station at this reporting time. Otherwise, when only inter-UE interference exists in the reporting interval, only interference information on the inter-UE interference is reported to the base station at this reporting time.

Although only one neighbor UE 204 is present in the scenario shown in fig. 3, multiple neighbor UEs of UE 201 may be present in other scenarios not shown herein. In this case, if there is different inter-UE interference from different neighbor UEs present in different PRBs or TTIs in one reporting interval, it is necessary to report all inter-UE interference from different neighbor UEs to the base station at this reporting time. Similarly, if intra-UE interference is also present in this interval during this reporting interval, then all inter-UE interference from the UE itself and all inter-UE interference from different neighboring UEs need to be reported to the base station at this reporting time.

Further, as described above, full duplex operation may be performed between only UE 201 and base station 202 in a full duplex physical resource scheduling unit, i.e., UL and DL transmissions are for the same UE. When there are one or more neighboring UEs of UE 201, full duplex operation may also be performed in the full duplex physical resource scheduling unit between base station 202, UE 201 and one of the neighboring UEs, i.e. UL and DL transmissions are for two different UEs. In addition, full duplex operation may also be performed between UEs through the side link. For example, although not shown in fig. 3, full duplex operation may also be performed between UE 201 and UE 204 through a side link therebetween. As another example, in the same physical unit, UE 201 may receive signals from UE 204 via a side link between them, and UE 204 may receive signals from another UE (not shown in fig. 3) via a side link between them. In addition, there may be more complex cases where DL/UL channels and side chain channels are mixed. For example, UE 201 receives DL signals from base station 202 while transmitting side link signals to UE 204. DL and side chain transmissions are operated in the same time/frequency resource.

With the wireless communication method 40, by reporting interference information on interference from at least one of the user equipment itself and at least one neighboring user equipment of the user equipment to the base station, the base station can perform scheduling based on the interference information, thereby improving accuracy of scheduling and system performance.

The content and manner of transmission of the interference information will be discussed in detail below by way of example.

In accordance with an embodiment of the present disclosure, in the wireless communication method 40 as shown in fig. 4, the interference information includes an interference cancellation (interference cancellation) capability of the user equipment, and the interference cancellation capability is transmitted by RRC (radio resource control) signaling during a capability transfer procedure of the user equipment.

Specifically, for ease of understanding, the scenario of intra-UE interference shown in fig. 2 is taken as an example. For example, the interference cancellation capability may include information regarding whether the user equipment supports full duplex and the level of intra-UE interference (i.e., self-interference) cancellation. The intra-UE interference cancellation level may correspond to RF or baseband, or may be, for example, a total level of RF and baseband, and the disclosure is not limited thereto. The capability transfer procedure of the user equipment occurs in an initial phase, e.g. when the user equipment is powered on.

In this embodiment, it is assumed that UE 201 may support full duplex and interact with base station 202 as shown in fig. 2. Thus, based on the interference information reported by the UE 201, the base station 202 may determine how or if full duplex operation is scheduled for the UE 201.

By reporting only the interference cancellation capability of the user equipment to the base station through RRC signaling during the capability transfer procedure of the user equipment, the signaling overhead may be very small (such as 1 bit), while the base station may schedule full duplex operation well based on the reported interference cancellation capability.

In accordance with an embodiment of the present disclosure, in the wireless communication method 40 as shown in fig. 4, the interference information further comprises absolute interference from at least one of the user equipment itself and at least one neighboring user equipment of the user equipment.

In particular, in addition to the interference cancellation capability as mentioned above, the interference information may also comprise absolute interference, which may be e.g. absolute intra-UE interference or inter-UE interference values. Then, based on the interference cancellation capability and the absolute interference, the base station can infer how much interference remains after the user equipment side cancels the interference and perform scheduling of full duplex operation accordingly.

In accordance with an embodiment of the present disclosure, in the wireless communication method 40 as shown in fig. 4, absolute interference is periodically or aperiodically transmitted through RRC signaling. That is, absolute interference may be transmitted through RRC signaling in addition to interference cancellation capability. The difference between them is that the interference cancellation capability is sent during the capability transfer procedure (e.g. initial phase) of the user equipment, whereas the absolute interference is then sent periodically or aperiodically through dedicated RRC signaling.

For ease of understanding, the scenario of intra-UE interference is taken as an example. It is assumed that there are two UEs, namely UE a and UE B, which can both support full duplex and interact with the same base station C, respectively. In addition, the threshold s=5 dB is configured in advance by the base station C to control the full duplex operation (i.e., perform scheduling).

When there is only intra-UE interference on the UE a side, UE a first reports intra-UE interference cancellation capability to base station C through RRC signaling during its capability transfer procedure. The intra-UE interference cancellation capability includes, for example, information indicating that UE a can support full duplex and that the intra-UE interference level is 110 dB. UE a also reports 113dB of absolute intra-UE interference to base station C, either periodically or aperiodically, through dedicated RRC signaling. On the base station C side, based on the intra-UE interference cancellation capability reported by UE a and the absolute intra-UE interference, base station C can infer that the remaining intra-UE interference after the UE a side cancellation interference is equal to 3dB by subtracting the intra-UE interference level of 110dB from the absolute intra-UE interference of 113 dB. The remaining 3dB of intra-UE interference means that if full duplex operation is performed between UE a and base station C, the SINR (signal to interference plus noise ratio) will be degraded by about 3dB. Next, base station C compares the 3dB of remaining intra-UE interference with a threshold S of 5 dB. Since the remaining intra-UE interference is less than the threshold S, the base station S decides that full duplex operation can be performed on UE a.

Similarly, when there is only intra-UE interference on the UE B side, UE B first reports intra-UE interference cancellation capability to base station C through RRC signaling during its capability transfer procedure. The intra-UE interference cancellation capability includes, for example, information indicating that UE B may support full duplex and that the intra-UE interference level is 102 dB. UE B then also reports 110dB of absolute intra-UE interference to base station C, periodically or aperiodically, through dedicated RRC signaling. On the base station C side, based on the intra-UE interference cancellation capability reported by UE B and the absolute intra-UE interference, base station C can infer that the remaining intra-UE interference after the UE B side cancellation interference is equal to 8dB by subtracting the intra-UE interference level of 102dB from the absolute intra-UE interference of 110 dB. The remaining 8dB of intra-UE interference means that if full duplex operation is performed between UE B and base station C, the SINR will degrade by approximately 8dB. Next, base station C compares the remaining intra-UE interference of 8dB with a threshold S of 5 dB. Since the remaining intra-UE interference is greater than the threshold S, the base station S decides that full duplex operation cannot be performed on the UE B.

By reporting the interference cancellation capability and the absolute interference to the base station by RRC signaling, respectively, the signaling overhead can be small and the impact on the physical layer criteria is small, while the base station can schedule full duplex operation well based on the combination of interference cancellation capability and absolute interference.

In the wireless communication method 40 as shown in fig. 4, absolute interference is transmitted in a MAC (medium access control) layer accompanied by PHR (power headroom report) based on PHR report timing according to an embodiment of the disclosure.

Although the foregoing embodiments show that absolute interference may be periodically or aperiodically transmitted to a base station through RRC signaling, the present disclosure is not limited thereto.

Also, UE a and B are taken as examples. In view of the fact that intra-UE interference may vary with a change in transmission power, absolute intra-UE interference may also be transmitted in the MAC layer, e.g. in the MAC CE (control element) to the base station C accompanied by PHR. That is, the reporting of absolute intra-UE interference and the reporting of PHR are simultaneous and may be based on PHR reporting timing.

Thus, on the base station C side, based on the absolute intra-UE interference and PHR reported by the UE a/B, the base station C can determine the relationship between the intra-UE interference and the transmission power of the UE a/B and adjust the transmission power accordingly to reduce the intra-UE interference and improve the performance of the full duplex operation.

In accordance with an embodiment of the present disclosure, in the wireless communication method 40 as shown in fig. 4, the interference information comprises residual interference from at least one of the user equipment itself and at least one neighboring user equipment of the user equipment.

Although the above embodiments show that the interference cancellation capability and absolute interference can be reported to the base station, and the base station in turn infers the interference remaining after the user equipment side cancellation of the interference based on the two information, the disclosure is not limited thereto. Instead, only the residual interference may be reported to the base station for scheduling. The residual interference corresponds to interference remaining after interference cancellation at the user equipment side.

More specifically, for ease of understanding, UEs a and B are still taken as examples. For example, UE a may send 3dB of residual intra-UE interference (which corresponds to 3dB of residual intra-UE interference) directly to base station C. In this case, based on the 3dB residual intra-UE interference, the base station C does not need to perform the derivation again, and only needs to compare the 3dB residual intra-UE interference with the threshold S of 5dB and decide that full duplex operation can be performed on the UE a.

Similarly, UE B may also send 8dB of residual intra-UE interference (which corresponds to 8dB of residual intra-UE interference) directly to base station C. In this case, based on the 8dB residual intra-UE interference, the base station C does not need to perform the derivation again, and only needs to compare the 8dB residual intra-UE interference with the 5dB threshold S, and decides that full duplex operation cannot be performed on the UE B.

By reporting the residual interference to the base station, the signaling overhead can be reduced, and the processing load on the base station side can also be reduced.

In a wireless communication method 40 as shown in fig. 4, according to an embodiment of the present disclosure, residual interference is periodically or aperiodically transmitted in a physical layer based on a trigger transmitted through downlink control signaling from a base station.

Although the above embodiments illustrate that the interference information may be transmitted through RRC signaling, the present disclosure is not limited thereto. The interference information may also be reported in the physical layer in consideration of the relatively long reporting period of the RRC signaling. With the physical layer, the interference information can be reported more frequently, i.e., the physical layer report can reflect the instantaneous interference information, and thus is particularly useful for the case where the interference is fast.

In addition, the residual interference may be periodically transmitted in the physical layer, which will be discussed in detail below. Alternatively, the residual interference may also be sent aperiodically in the physical layer, e.g. based on a trigger from the base station. More specifically, for example, the base station sends a trigger to the user equipment, for example, through downlink control signaling (e.g., in DCI (downlink control information) in (E) PDCCH ((enhanced) physical downlink control channel)) only when system performance is degraded to some extent. Thus, the user equipment reports the residual interference to the base station only when a trigger is received.

With trigger-based aperiodic interference information reporting, signaling overhead can be reduced and flexibility in reporting interference information can be improved.

In accordance with an embodiment of the present disclosure, in a wireless communication method 40 as shown in fig. 4, a new UCI (uplink control information) type is defined for full duplex operation and is transmitted by PUCCH (physical uplink control channel) or PUSCH (physical uplink shared channel), wherein the new UCI type indicates one of: residual interference values; a request to stop full duplex operation; residual interference value and request to stop full duplex operation; and a request to stop full duplex operation and an existing UCI type such as CQI or HARQ-ACK (hybrid automatic repeat request-acknowledgement).

Specifically, when the residual interference is periodically reported in the physical layer, a new UCI type may be defined and transmitted through the PUCCH/PUSCH. For full duplex operation, a new value indicating a request to stop full duplex may also be included in this UCI. As an example, table 1 below shows an exemplary UCI design for interference information reporting.

Table 1 exemplary UCI design for interference information reporting

As shown in table 1, it is assumed that 2 bits are used for this UCI type. Specifically, when two bits of UCI are 00, it indicates that a residual interference value after interference cancellation at the user equipment side is in the range of 0-2 dB. When two bits of UCI are 01, a residual interference value after interference cancellation at the user equipment side is indicated to be in the range of 2-4 dB. When two bits of UCI are 10, a residual interference value after interference cancellation at the user equipment side is indicated to be greater than 4dB. When the two bits of UCI are 11, a request to stop full duplex is indicated.

If a user equipment stops full duplex request when its residual interference exceeds a threshold, e.g., using the above UCI type report as shown in table 1, the base station will stop full duplex operation for such user equipment based on UCI received from the user equipment.

Furthermore, the residual interference may be a variation with a small dynamic range. Thus, 3 bits may define 8 levels for the residual self-interference value. As another example, table 2 below shows an exemplary UCI design for interference information reporting.

Table 2 exemplary UCI design for interference information reporting

As shown in table 2, it is assumed that 3 bits are used for this UCI type. Specifically, when three bits of UCI are 000, the residual interference value after interference cancellation at the user equipment side is indicated to be 0dB. When the three bits of UCI are 001, it indicates that the residual interference value after interference cancellation at the user equipment side is in the range of 0-1 dB. When the three bits of UCI are 010, it indicates that the residual interference value after interference cancellation at the user equipment side is in the range of 1-2 dB. When the three bits of UCI are 011, it indicates that the residual interference value after interference cancellation at the user equipment side is in the range of 2-3 dB. When the three bits of UCI are 100, it indicates that the residual interference value after interference cancellation at the user equipment side is in the range of 3-4 dB. When the three bits of UCI are 101, the residual interference value after interference cancellation at the user equipment side is indicated to be in the range of 4-5 dB. When the three bits of UCI are 110, the residual interference value after interference cancellation at the user equipment side is indicated to be in the range of 5-6 dB. When the three bits of UCI are 111, the residual interference value after interference cancellation at the user equipment side is indicated to be greater than 6dB.

Table 1 corresponds to UCI types indicating both the residual interference value and the request to stop the full duplex operation, and table 2 corresponds to UCI types indicating only the residual interference value.

Furthermore, completely new UCI types may be specifically designed to stop full duplex. In this case, the new UCI type may indicate only a request to stop the full duplex operation. Alternatively, such a request may also be encoded jointly with other existing UCI types. That is, a new UCI type may be designed for indicating both a request to stop full duplex operation and an existing UCI type.

It is noted that the above example designs for UCI are for illustration purposes only, and the present disclosure is not limited thereto. Those skilled in the art can devise any suitable type of UCI based on the teachings of this disclosure.

In accordance with an embodiment of the present disclosure, in a wireless communication method 40 as shown in fig. 4, residual interference is transmitted in the MAC layer accompanied by PHR based on PHR report timing.

Similar to absolute interference, residual interference may also be transmitted in the MAC layer and accompanied by PHR based on PHR report timing. Also, UE a and B are taken as examples. In view of the fact that intra-UE interference may vary with a change in transmission power, residual intra-UE interference may also be transmitted in the MAC layer, e.g., in the MAC CE to the base station C, accompanied by PHR. That is, reporting of residual intra-UE interference and reporting of PHR are simultaneous and based on PHR reporting timing.

Thus, on the base station C side, based on the residual intra-UE interference and PHR reported by the UE a/B, the base station C may determine a relationship between the intra-UE interference and the transmission power of the UE a/B and adjust the transmission power accordingly to reduce the intra-UE interference and improve performance of full duplex operation.

Although the above embodiments discuss reporting of interference information by taking the case of intra-UE interference as an example, the present disclosure is not limited thereto. The above example manner of reporting intra-UE interference may also be applied to cases of inter-UE interference. For example, when only inter-UE interference exists at the user equipment side, the user equipment may report only its inter-UE interference cancellation capability to the base station through RRC signaling during its capability transfer procedure. Alternatively, the user equipment may report its inter-UE interference cancellation capability to the base station during its capability transfer procedure by RRC signaling and then report the absolute inter-UE interference to the base station periodically or aperiodically. Alternatively, the user equipment may report the residual inter-UE interference only to the base station periodically or aperiodically. Similarly, absolute/residual inter-UE interference may be transmitted in the physical layer or in the MAC layer through RRC signaling.

Moreover, the above example manner of reporting intra-UE interference may also be applied to reporting intra-UE interference and inter-UE interference, and details thereof will not be described here in order to avoid redundancy.

It is noted that the content and the manner of transmission of the interference information regarding the interference from at least one of the user equipment itself and at least one neighboring user equipment of the user equipment is not limited to the above embodiments of the present invention. Any other suitable content may be included in the interference information by those skilled in the art to assist the base station in performing scheduling for full duplex operation. Moreover, those skilled in the art may send interference information to the base station in any other suitable manner than the RRC signaling, physical layer, and MAC layer described herein.

Although not shown in fig. 4, the wireless communication method 40 may also include the step of measuring interference to form interference information, wherein any type of signal from the user device may be used to measure interference from the user device itself, in accordance with embodiments of the present disclosure.

As described above, the base station cannot simply obtain intra-UE interference and/or inter-UE interference from the CQI/RSRQ/RSSI report, nor can it directly measure intra-UE interference and/or inter-UE interference at the base station side. Furthermore, there is no uplink signal measured by the UE based on the current RAN1 standard. Thus, how to measure intra-UE interference and/or inter-UE interference is one of the most important issues for full duplex operation.

In particular, the user equipment may measure intra-UE interference and/or inter-UE interference at the user equipment side before reporting to the base station interference information about interference from at least one of the user equipment itself and at least one neighboring user equipment of the user equipment. More specifically, in principle, when a known signal is transmitted in the UL channel from the user equipment, if there is no other interference, then only its self-interference will be received at the user equipment. Thus, for intra-UE interference, any type of uplink signal from the user equipment may be used to potentially measure it, since it is known to itself.

Fig. 5 schematically illustrates an example of a frame structure of UL resource assignment in full duplex. As shown in fig. 5, the horizontal axis indicated by T represents the time domain, and the vertical axis indicated by F represents the frequency domain. Block 501 represents a PRB 501, which is assumed to be a full duplex PRB, with both UL and DL channels assigned. Also, it is assumed that the PRB 501 has an LTE frame structure, and LTE resource assignment is exemplified here. For simplicity, block 501 shows only UL resource assignments, and each small block in block 501 represents a RE (resource element).

More specifically, as shown in block 501, small boxes filled with left diagonal lines represent REs assigned with UL DMRS (demodulation reference signals), small boxes filled with right diagonal lines represent REs assigned with UL SRS (sounding reference signals), and blank small boxes represent REs assigned with UL data. As shown in fig. 5, any UL signal (e.g., UL DMRS, UL SRS, or UL data) or any combination thereof assigned in any RE in PRB 501 may be used to measure intra-UE interference because all UL signals are known to the user equipment itself.

The above example assumes that full duplex operation is performed between the UE and the base station; however, the present disclosure is not limited thereto. As described above, full duplex operation may also be performed between UEs through the side link. In this case, since any type of side-link signals transmitted from the UE are known to themselves, they can also be used to measure intra-UE interference. In addition, there may be more complex cases where DL/UL channels and side chain channels are mixed. For example, the UE receives DL from the base station while transmitting a side link to other UEs. DL and side links are operated in the same time/frequency resource. In this case, the side chain transmission causes self-interference (intra-UE interference) to DL reception. Similarly, any type of side-link signal sent from the UE to other UEs at this time may also be used to measure intra-UE interference. Another case is that the UE receives side chain channels from other UEs but transmits UL channels to the base station in the same time/frequency resources. In this case, the UL transmission will create some self-interference to the side link reception and any type of UL signal may be used to measure the self-interference at this time.

It is noted that the signal used to measure intra-UE interference is not limited to uplink and/or side-link signals from the UE. Any other type of signal, such as a backhaul link signal transmitted from the UE and known to the UE, may be used to measure inter-UE interference.

In the present embodiment, since any type of signal from the user equipment can be used to measure intra-UE interference, accurate intra-UE interference measurement can be achieved with little impact on specifications.

In accordance with an embodiment of the present disclosure, in a wireless communication method 40 as shown in fig. 4, time/frequency resources in a downlink channel are configured by a base station for measuring interference from at least one of the user equipment itself and at least one neighboring user equipment of the user equipment.

Specifically, taking intra-UE interference as an example, a base station may configure or indicate that one or more PRBs or subframes in DL are used for intra-UE interference measurement. Furthermore, during one or more PRBs or subframes used for measurements, the base station may control or coordinate other interference, e.g. from other cells or DL/sidelink received signals, in order to reduce or even avoid the impact on intra-UE interference measurements. Thus, the accuracy of the intra-UE interference measurement can be ensured.

Although not shown in fig. 4, the wireless communication method 40 may further include the step of averaging the measured interference on the physical resource units to form interference information, according to an embodiment of the present disclosure.

In particular, the interference information reported to the base station may be an average interference value over the physical resource units. Here, the physical resource unit may be PBR, one or more subframes, one or more subbands, etc., depending on different situations.

For ease of understanding, intra-UE interference is also taken as an example. For example, intra-UE interference may be averaged for each PRB pair. Alternatively, if intra-UE interference is to be reported through RRC signaling, it is more reasonable to average the intra-UE interference over several subframes. Alternatively, if intra-UE interference is to be reported in the physical layer, this information may be reported in terms of the wideband or sub-band in a subframe or TTI. In one subframe or TTI, the UE may report the averaged intra-UE interference over a wideband (which consists of multiple subbands) of one carrier of such a subframe/TTI. It reflects the averaged intra-UE interference situation for the entire subframe/TTI of a given carrier. In this case, less signaling overhead would be spent. Furthermore, intra-UE interference may be reported for each sub-band, which would be more accurate on interference reporting and beneficial for scheduling/coordination of full duplex operation by the base station. The cost is that the signaling size for reporting is large. The base station may configure which reporting mode to use depending on different situations.

Although only intra-UE interference measurement is discussed above, inter-UE interference may be measured at the user equipment side in addition to intra-UE interference. Specifically, the scenario shown in fig. 3 is taken as an example here. UE 201 may measure inter-UE interference from its neighboring UEs 204. The first measurement scenario requires assistance from the base station 202. Since the UE 204 is not aware of the UL signal transmitted from the UE 204, the base station 202 should inform the UE 201 of the UL signal transmitted from the UE 204 for inter-UE interference measurement. More specifically, since the inter-UE interference is DL reception transmitted from UL of UE 204 to UE 201, base station 202 may inform UE 201 of the UE ID or sequence of UE 204, and UE 201 may measure the inter-UE interference from UE 204 accordingly. Further, the base station 202 may schedule/coordinate full duplex operation accordingly based on the measured inter-UE interference.

As described above, although only one neighbor UE 204 is shown in fig. 3, there may be more neighbor UEs in the same cell. When two or more neighboring UEs are present and both of these neighboring UEs cause inter-UE interference to UE 204, UE 204 may utilize the assistance of base station 202 to measure inter-UE interference from each neighboring UE and report it to base station 202.

Alternatively, the UE 201 cannot know which UEs are around it without the assistance of the base station 202. In this case, another measurement scheme for inter-UE interference is that the UE 201 blindly detects the signal/interference of other UEs. In this case, UE 201 may measure and report to base station 202 the total inter-UE interference from other UEs, but does not indicate which UE generated such inter-UE interference. In this case, the signaling design can be saved.

Similarly, since the side link transmission may be performed between UEs as described above, inter-UE interference may be caused from UL to side link or from side link to side link. For example, although not shown in fig. 3, in the same physical unit, UE 201 receives a side chain signal from UE 204, and UE 204 transmits the side chain signal to another UE or transmits an UL signal to base station 202. In this case, UE 204 will generate inter-UE interference to UE 201. Even in this case as well, UE 201 may also measure interference from UE 204 by any of the above measurement schemes.

Similar to the case of intra-UE interference measurement, in the case of inter-UE interference measurement, the time/frequency resources in UL/DL for inter-UE interference measurement may also be indicated or configured by the base station. Also, the base station may also control or coordinate other interference, e.g., from other cells or DL received signals, in order to reduce or even avoid the impact on inter-UE interference measurements. Therefore, the accuracy of the inter-UE interference measurement can be ensured. Moreover, inter-UE interference may also be averaged over any suitable physical resource element depending on the different circumstances.

It is noted that the above intra-UE interference and inter-UE interference measurement examples are for illustration purposes only and are not limiting of the invention. In addition, any existing mechanism for error handling may be used herein and may be controlled by the base station, which will not be described here to avoid redundancy.

In accordance with an embodiment of the present disclosure, in the wireless communication method 40 as shown in fig. 4, the downlink reference signal used for mobility measurement is not used for full duplex operation.

In cellular networks, when a mobile station (user equipment) moves from one cell to another and performs cell selection/reselection and handover, it must measure the signal strength/quality of neighboring cells. Suppose in an LTE network, a UE typically measures two parameters about an RS (reference signal) for mobility: such as RSRP (reference signal received power) and RSRQ (reference signal received quality). And, these RSs measured for mobility may be referred to herein as mobility RSs. For example, the mobility RS may include CSI-RS, CRS (cell-specific reference signals), or other RSs.

Fig. 6 schematically illustrates an example of a frame structure of UL and DL RS assignments in full duplex. As shown in fig. 6, it is assumed that the PRB 601 is a full-duplex PRB in which both UL and DL channels are assigned. Also, it is assumed that the PRB 601 has an LTE frame structure, and LTE RS assignment is exemplified herein. For example, the upper box 601' shows DL RS assignments, while the lower box 601 "shows UL RS assignments. It is noted that both blocks 601' and 601' are equivalent to PRB 601, and each small block in blocks 601' and 601 "represents an RE.

Also, as shown in PRB 601, the solid arrow pointing to the right means that the DL signal assigned on this PRB is for UE1, while the solid arrow pointing to the left means that the UL signal assigned on this PRB is also for UE1. That is, this example corresponds to a case in which UL and DL transmissions are for the same UE.

More specifically, as shown in block 601', boxes filled with horizontal lines represent REs assigned with DL CRS, boxes filled with dots represent REs assigned with DL CSI-RS, and blank boxes represent REs assigned with DL data. Also, as shown in block 601", the small boxes filled with left diagonal lines represent REs assigned UL DMRS, and the blank small boxes represent REs assigned UL data.

As described above, since DL CRS and DL CSI-RS will be used for mobility measurements, REs assigned with these mobility RSs should be protected and UL signals should not be transmitted on these REs, as shown in the dark squares representing the REs to be protected.

By further considering the mobility DL RS, the base station may make a trade-off in cost between mobility performance and full duplex performance.

The wireless communication method 40 is described in detail above with reference to fig. 2-6. With the wireless communication method 40, by reporting interference information on interference from at least one of the user equipment itself and at least one neighboring user equipment of the user equipment to the base station, the base station can perform scheduling based on the interference information, thereby improving accuracy of scheduling and system performance.

In another embodiment of the present disclosure, a wireless communication method 70 for a base station is provided, as shown in fig. 7. Fig. 7 illustrates a flow chart of a wireless communication method 70 for a base station according to another embodiment of the present disclosure.

As shown in fig. 7, the wireless communication method 70 starts in step S701, wherein interference information from a user equipment is received, wherein the interference information is about interference from at least one of the user equipment itself and at least one neighboring user equipment of the user equipment. Then, in step S702, scheduling is performed based on the interference information. After step S702, the wireless communication method 70 ends. In the wireless communication method 70, full duplex operation is performed between the user equipment and at least the base station. That is, the wireless communication method 40 is applied to a full duplex scenario. For example, the wireless communication method 70 may be applied to a base station 202, as shown in fig. 2 and 3.

In accordance with an embodiment of the present disclosure, in a wireless communication method 70 as shown in fig. 7, the interference information includes an interference cancellation capability of the user equipment, and the interference cancellation capability is transmitted from the user equipment through RRC signaling during a capability transfer procedure of the user equipment.

In accordance with an embodiment of the present disclosure, in the wireless communication method 70 as shown in fig. 7, the interference information further comprises absolute interference from at least one of the user equipment itself and at least one neighboring user equipment of the user equipment.

In accordance with an embodiment of the present disclosure, in a wireless communication method 70 as shown in fig. 7, absolute interference is transmitted from a user equipment in a MAC layer accompanied by PHR based on PHR report timing.

In accordance with an embodiment of the present disclosure, in a wireless communication method 70 as shown in fig. 7, absolute interference is periodically or aperiodically transmitted from a user equipment through RRC signaling.

In accordance with an embodiment of the present disclosure, in a wireless communication method 70 as shown in fig. 7, the interference information includes residual interference from at least one of the user equipment itself and at least one neighboring user equipment of the user equipment.

In accordance with an embodiment of the present disclosure, in a wireless communication method 70 as shown in fig. 7, residual interference is transmitted from a user equipment in a MAC layer, accompanied by PHR based on PHR report timing.

In accordance with an embodiment of the present disclosure, in a wireless communication method 70 as shown in fig. 7, residual interference is transmitted in the physical layer from a user equipment periodically or aperiodically.

Although not shown in fig. 7, the wireless communication method 70 may further include the step of transmitting a trigger to the user equipment through downlink control signaling, wherein the residual interference is transmitted from the user equipment based on the trigger, according to an embodiment of the present disclosure.

In accordance with an embodiment of the present disclosure, in a wireless communication method 70 as shown in fig. 7, a new UCI type is defined for full duplex operation and is transmitted from a device over PUCCH or PUSCH, wherein the new UCI type indicates one of: residual interference values; a request to stop full duplex operation; residual interference value and request to stop full duplex operation; stopping full duplex operation request and existing UCI types.

In accordance with an embodiment of the present disclosure, in a wireless communication method 70 as shown in fig. 7, interference is measured at a user device to form interference information, where any type of signal from the user device may be used to measure interference from the user device itself.

In accordance with an embodiment of the present disclosure, in the wireless communication method 70 as shown in fig. 7, the downlink reference signal used for mobility measurement is not used for full duplex operation.

Although not shown in fig. 7, the wireless communication method 70 may further include the step of configuring time/frequency resources in a downlink channel to measure interference from at least one of the user equipment itself and at least one neighboring user equipment of the user equipment, according to an embodiment of the present disclosure.

In a wireless communication method 70 as shown in fig. 7, measured interference is averaged over physical resource elements to form interference information at a user equipment, according to an embodiment of the present disclosure.

With the wireless communication method 70, by reporting interference information on interference from at least one of the user equipment itself and at least one neighboring user equipment of the user equipment to the base station, the base station can perform scheduling based on the interference information, thereby improving accuracy of scheduling and system performance.

In another embodiment of the present disclosure, a user device 800 as shown in fig. 8 is provided. Fig. 8 illustrates a block diagram of a user device 800 according to another embodiment of the present disclosure.

As shown in fig. 8, the user equipment 800 includes: a circuit 801 forming interference information about interference from at least one of the user equipment itself and at least one neighboring user equipment of the user equipment, and a transmitting unit 802 transmitting the interference information to the base station. Full duplex operation is performed between the user equipment 800 and at least the base station.

The user device 800 according to the present embodiment may further include a CPU (central processing unit) 810 for executing related programs to process various data and control operations of the respective units in the user device 800, a ROM (read only memory) 813 for storing various programs required for the CPU 810 to perform various processes and controls, a RAM (random access memory) 815 for storing intermediate data temporarily generated during the processes and controls of the CPU 810, and/or a storage unit 817 for storing various programs, data, and the like. The above circuits 801, transmission unit 802, CPU 810, ROM 813, RAM 815, and/or storage unit 817, etc. may be interconnected via a data and/or command bus 820 and transfer signals between each other.

The corresponding units as described above are not limiting the scope of the present disclosure. According to one embodiment of the present disclosure, the functions of the above circuit 801 and the transmitting unit 802 may be implemented by hardware, and the above CPU 810, ROM 813, RAM 815, and/or the storage unit 817 may not be necessary. Alternatively, part or all of the functions of the above circuit 801 or the transmission unit 802 may be implemented by functional software in combination with the above CPU 810, ROM 813, RAM 815, and/or the storage unit 817, etc.

In particular, the user equipment 800 may be the UE 201 shown in fig. 2 and 3 and may perform the wireless communication method 40 as described above in connection with fig. 4.

With the user equipment 800, by reporting interference information on interference from at least one of the user equipment itself and at least one neighboring user equipment of the user equipment to the base station, the base station can perform scheduling based on the interference information, thereby improving accuracy of scheduling and system performance.

It is noted that other technical features in the above wireless communication method 40 may also be incorporated into the user equipment 800 and will not be described here in order to avoid redundancy.

In another embodiment of the present disclosure, a base station 900 as shown in fig. 9 is provided. Fig. 9 illustrates a block diagram of a base station 900 according to another embodiment of the present disclosure.

As shown in fig. 9, the base station 900 includes: a receiving unit 901 receiving interference information from a user equipment, wherein the interference information is about interference from at least one of the user equipment itself and at least one neighboring user equipment of the user equipment; and a circuit 902 that performs scheduling based on the interference information. Full duplex operation is performed between the user equipment and at least the base station 900.

The base station 900 according to the present embodiment may further include a CPU (central processing unit) 910 for executing related programs to process various data and control operations of the respective units in the base station 900, a ROM (read only memory) 913 for storing various programs required for the CPU 910 to execute various processes and controls, a RAM (random access memory) 915 for storing intermediate data temporarily generated during the processes and controls of the CPU 910, and/or a storage unit 917 for storing various programs, data, and the like. The above receiving unit 901, circuit 902, CPU 910, ROM 913, RAM 915, and/or storage unit 917, etc. may be interconnected via a data and/or command bus 920 and transfer signals between each other.

The respective units described above do not limit the scope of the present disclosure. According to one embodiment of the present disclosure, the functions of the above receiving unit 901 and the circuit 902 may be implemented by hardware, and the above CPU 910, ROM 913, RAM 915, and/or storage unit 917 may not be necessary. Alternatively, part or all of the functions of the above receiving unit 901 and/or the circuit 902 may also be implemented by functional software in combination with the above CPU 910, ROM 913, RAM 915, and/or storage unit 917, or the like.

Specifically, the base station 900 may be the base station 202 shown in fig. 2 and 3, and may perform the wireless communication method 70 described above in connection with fig. 7.

With the base station 900, by reporting interference information on interference from at least one of the user equipment itself and at least one neighboring user equipment of the user equipment to the base station, the base station can perform scheduling based on the interference information, thereby improving accuracy of scheduling and system performance.

It is noted that other technical features in the above wireless communication method 70 may also be incorporated in the base station 900 and will not be described here in order to avoid redundancy.

The present disclosure may be implemented by software, hardware, or software in cooperation with hardware. Each of the functional blocks used in the description of each of the above embodiments may be implemented by an LSI that is an integrated circuit, and each of the processes described in each of the embodiments may be controlled by the LSI. They may be formed separately as chips or may be formed as one chip to include some or all of the functional blocks. They may include a data input and an output coupled thereto. Depending on the degree of integration, the LSI herein may be referred to as an IC, a system LSI, a super LSI or a super LSI. However, the technique of implementing the integrated circuit is not limited to LSI, and may be implemented by using a dedicated circuit or a general-purpose processor. Further, an FPGA (field programmable gate array) which can be programmed after the LSI is manufactured or a reconfigurable processor which can reconfigure connection and setting of circuit cells disposed inside the LSI may be used.

It is noted that the present disclosure is intended to make various changes or modifications by those skilled in the art based on the description and known techniques presented in the specification without departing from the contents and scope of the present disclosure, and these changes and applications fall within the scope of the claims. Further, the constituent elements of the above-described embodiments may be arbitrarily combined without departing from the scope of the present disclosure.

Embodiments of the present disclosure may provide at least the following subject matter.

(1) A user equipment, comprising:

circuitry forming interference information about interference from at least one of the user equipment itself and at least one neighboring user equipment of the user equipment; and

a transmitting unit for transmitting the interference information to the base station, wherein

Full duplex operation is performed between the user equipment and at least the base station.

(2) The user equipment of (1), wherein the interference information includes interference cancellation capability of the user equipment, and the interference cancellation capability is transmitted through RRC (radio resource control) signaling during a capability transfer procedure of the user equipment.

(3) The user equipment of (2), wherein the interference information further comprises absolute interference from at least one of the user equipment itself and at least one neighboring user equipment of the user equipment.

(4) The user equipment of (3), wherein the absolute interference is transmitted in a MAC (medium access control) layer and is accompanied by PHR (power headroom report) based on PHR report timing.

(5) The user equipment of (3), wherein the absolute interference is transmitted periodically or aperiodically through RRC signaling.

(6) The user equipment of (1), wherein the interference information comprises residual interference from at least one of the user equipment itself and at least one neighboring user equipment of the user equipment.

(7) The user equipment of (6), wherein the residual interference is transmitted in the MAC layer and is accompanied by PHR based on PHR report timing.

(8) The user equipment of (6), wherein the residual interference is transmitted in the physical layer periodically or aperiodically based on a trigger transmitted through downlink control signaling from the base station.

(9) The user equipment of (8), wherein a new UCI (uplink control information) type is defined for full duplex operation and is transmitted through PUCCH (physical uplink control channel) or PUSCH (physical uplink shared channel), wherein the new UCI type indicates one of: residual interference values; a request to stop full duplex operation; residual interference value and request to stop full duplex operation; and stopping full duplex operation and existing UCI type requests.

(10) The user equipment of (1), wherein the circuitry further measures interference to form interference information, wherein any type of signal from the user equipment is usable to measure interference from the user equipment itself.

(11) The user equipment of (10), wherein the downlink reference signals used for mobility measurements are not used for full duplex operation.

(12) The user equipment of (10), wherein the time/frequency resources in the downlink channel for measuring interference from at least one of the user equipment itself and at least one neighboring user equipment of the user equipment are configured by the base station.

(13) The user equipment of (10), wherein the circuitry further averages the measured interference over the physical resource units to form the interference information.

(14) A base station, comprising:

a receiving unit that receives interference information from a user equipment, wherein the interference information is about interference from at least one of the user equipment itself and at least one neighboring user equipment of the user equipment; and

a circuit that performs scheduling based on interference information, wherein

At least a base station and a user equipment and performs full duplex operation therebetween.

(15) The base station of (14), wherein the interference information includes an interference cancellation capability of the user equipment, and the interference cancellation capability is transmitted from the user equipment through RRC (radio resource control) signaling during a capability transfer procedure of the user equipment.

(16) The base station of (15), wherein the interference information further comprises absolute interference from at least one of the user equipment itself and at least one neighboring user equipment of the user equipment.

(17) The base station of (16), wherein the absolute interference is transmitted in a MAC (medium access control) layer from a user equipment and is accompanied by PHR (power headroom report) based on PHR report timing.

(18) The user equipment of (16), wherein the absolute interference is transmitted periodically or aperiodically from the user equipment through RRC signaling.

(19) The base station of (14), wherein the interference information comprises residual interference from at least one of the user equipment itself and at least one neighboring user equipment of the user equipment.

(20) The base station of (19), wherein the residual interference is transmitted in the MAC layer from the user equipment and is accompanied by PHR based on PHR report timing.

(21) The base station of (19), wherein the residual interference is transmitted in the physical layer from the user equipment periodically or aperiodically.

(22) The base station of (21), further comprising:

and a transmitting unit transmitting a trigger to the user equipment through downlink control signaling, wherein the residual interference is transmitted from the user equipment based on the trigger.

(23) The base station of (21), wherein a new UCI (uplink control information) type is defined for full duplex operation and is transmitted from the equipment through PUCCH (physical uplink control channel) or PUSCH (physical uplink shared channel), wherein the new UCI type indicates one of: residual interference values; a request to stop full duplex operation; residual interference value and request to stop full duplex operation; and stopping full duplex operation and existing UCI type requests.

(24) The base station of (1), wherein interference is measured at the user equipment to form interference information, wherein any type of signal from the user equipment can be used to measure interference from the user equipment itself.

(25) The base station of (24), wherein the downlink reference signals used for mobility measurements are not used for full duplex operation.

(26) The base station of (24), wherein the circuitry is further configured with time/frequency resources in the downlink channel for measuring interference from at least one of the user equipment itself and at least one neighboring user equipment of the user equipment.

(27) The base station of (24), wherein the interference measured on the physical resource units is averaged to form interference information at the user equipment.

(28) A wireless communication method for a user device, comprising:

forming interference information about interference from at least one of the user equipment itself and at least one neighboring user equipment of the user equipment; and

transmitting interference information to a base station, wherein

(29) The wireless communication method of (28), wherein the interference information includes an interference cancellation capability of the user equipment, and the interference cancellation capability is transmitted through RRC (radio resource control) signaling during a capability transfer procedure of the user equipment.

(30) The wireless communication method of (29), wherein the interference information further comprises absolute interference from at least one of the user equipment itself and at least one neighboring user equipment of the user equipment.

(31) The wireless communication method of (30), wherein absolute interference is transmitted in a MAC (medium access control) layer and is accompanied by PHR (power headroom report) based on PHR report timing.

(32) The wireless communication method of (30), wherein the absolute interference is transmitted periodically or aperiodically through RRC signaling.

(33) The wireless communication method of (28), wherein the interference information comprises residual interference from at least one of the user equipment itself and at least one neighboring user equipment of the user equipment.

(34) The wireless communication method of (33), wherein the residual interference is transmitted in the MAC layer and is accompanied by PHR based on PHR report timing.

(35) The wireless communication method of (33), wherein the residual interference is transmitted in the physical layer periodically or aperiodically based on a trigger transmitted through downlink control signaling from the base station.

(36) The wireless communication method of (35), wherein a new UCI (uplink control information) type is defined for full duplex operation and is transmitted through PUCCH (physical uplink control channel) or PUSCH (physical uplink shared channel), wherein the new UCI type indicates one of: residual interference values; a request to stop full duplex operation; residual interference value and request to stop full duplex operation; and stopping full duplex operation and existing UCI type requests.

(37) The wireless communication method of (28), further comprising:

interference is measured to form interference information, where any type of signal from the user equipment may be used to measure interference from the user equipment itself.

(38) The wireless communication method of (37), wherein the downlink reference signal used for mobility measurements is not used for full duplex operation.

(39) The wireless communication method of (37), wherein the time/frequency resources in the downlink channel for measuring interference from at least one of the user equipment itself and at least one neighboring user equipment of the user equipment are configured by the base station.

(40) The wireless communication method of (37), further comprising:

the measured interference on the physical resource units is averaged to form interference information.

(41) A wireless communication method for a base station, comprising:

receiving interference information from a user equipment, wherein the interference information is about interference from at least one of the user equipment itself and at least one neighboring user equipment of the user equipment; and

performing scheduling based on interference information, wherein

(42) The wireless communication method of (41), wherein the interference information includes an interference cancellation capability of the user equipment, and the interference cancellation capability is transmitted from the user equipment through RRC (radio resource control) signaling during a capability transfer procedure of the user equipment.

(43) The wireless communication method of (42), wherein the interference information further comprises absolute interference from at least one of the user equipment itself and at least one neighboring user equipment of the user equipment.

(44) The wireless communication method of (43), wherein the absolute interference is transmitted from the user equipment in a MAC (medium access control) layer accompanied by PHR (power headroom report) based on PHR report timing.

(45) The wireless communication method of (43), wherein absolute interference is transmitted periodically or aperiodically from the user equipment through RRC signaling.

(46) The wireless communication method of (41), wherein the interference information comprises residual interference from at least one of the user equipment itself and at least one neighboring user equipment of the user equipment.

(47) The wireless communication method of (46), wherein the residual interference is transmitted in the MAC layer from the user equipment and is accompanied by PHR based on PHR reporting timing.

(48) The method of wireless communication of (46), wherein the residual interference is transmitted in the physical layer from the user equipment periodically or aperiodically.

(49) The method of wireless communication of (48), further comprising:

a trigger is sent to the user equipment through downlink control signaling, wherein residual interference is sent from the user equipment based on the trigger.

(50) The wireless communication method of (48), wherein a new UCI (uplink control information) type is defined for full duplex operation and is transmitted from the equipment through PUCCH (physical uplink control channel) or PUSCH (physical uplink shared channel), wherein the new UCI type indicates one of: residual interference values; a request to stop full duplex operation; residual interference value and request to stop full duplex operation; and stopping full duplex operation and existing UCI type requests.

(51) The wireless communication method of (41), wherein interference is measured at the user equipment to form interference information, wherein any type of signal from the user equipment can be used to measure interference from the user equipment itself.

(52) The wireless communication method of (51), wherein the downlink reference signal used for mobility measurement is not used for full duplex operation.

(53) The wireless communication method of (51), further comprising:

time/frequency resources in the downlink channel are configured for measuring interference from at least one of the user equipment itself and at least one neighboring user equipment of the user equipment.

(54) The wireless communication method of (51), wherein the interference measured on the physical resource units is averaged to form interference information at the user equipment.

Further, embodiments of the present disclosure may also provide an integrated circuit comprising module(s) for performing the step(s) in the above respective communication method. Additionally, embodiments of the present invention may also provide a computer-readable storage medium having stored thereon a computer program comprising program code which, when executed on a computing device, performs the step(s) of the above respective communication method.

Claims

1. A user equipment, comprising:

circuitry forming interference information regarding interference from at least one of the user equipment itself and at least one neighboring user equipment of the user equipment, wherein the interference information includes residual interference from at least one of the user equipment itself and the at least one neighboring user equipment of the user equipment; and

a transmitting unit for transmitting the interference information to a base station, wherein

Full duplex operation is performed between the user equipment and at least the base station,

wherein a new uplink control information UCI type is defined for the full duplex operation and is transmitted over a physical uplink control channel PUCCH or a physical uplink shared channel PUSCH, wherein the new UCI type indicates a residual interference value of the residual interference and a request to stop full duplex operation.

2. The user equipment of claim 1, wherein the interference information comprises interference cancellation capabilities of the user equipment, and the interference cancellation capabilities are sent by radio resource control, RRC, signaling during a capability transfer procedure of the user equipment.

3. The user equipment of claim 2, wherein, the interference information further comprises absolute interference from at least one of the user equipment itself and at least one neighboring user equipment of the user equipment.

4. The user equipment of claim 3, wherein the absolute interference is transmitted in a medium access control, MAC, layer and is accompanied by a PHR based on a power headroom report, PHR, reporting timing.

5. The user equipment of claim 3, wherein the absolute interference is transmitted periodically or aperiodically through RRC signaling.

6. The user equipment of claim 1, wherein the residual interference is transmitted in a MAC layer and is accompanied by PHR based on PHR report timing.

7. The user equipment of claim 1, wherein the residual interference is transmitted in a physical layer periodically or aperiodically based on a trigger transmitted through downlink control signaling from the base station.

8. The user equipment of claim 1, wherein the circuitry is further to measure the interference to form the interference information, wherein any type of signal from the user equipment is available to measure the interference from the user equipment itself.

9. The user equipment of claim 8, wherein the downlink reference signals used for mobility measurements are not used for full duplex operation.

10. The user equipment of claim 8, wherein time/frequency resources in a downlink channel are configured by the base station for measuring the interference from at least one of the user equipment itself and at least one neighboring user equipment of the user equipment.

11. A base station, comprising:

a receiving unit that receives interference information from a user equipment, wherein the interference information is about interference from at least one of the user equipment itself and at least one neighboring user equipment of the user equipment, wherein the interference information includes residual interference from at least one of the user equipment itself and the at least one neighboring user equipment of the user equipment; and

a circuit that performs scheduling based on the interference information, wherein

12. The base station of claim 11, wherein the interference information comprises interference cancellation capability of the user equipment, and the interference cancellation capability is transmitted from the user equipment through radio resource control, RRC, signaling during a capability transfer procedure of the user equipment.

13. The base station of claim 12, wherein the interference information further comprises absolute interference from at least one of the user equipment itself and at least one neighboring user equipment of the user equipment.

14. The base station of claim 13, wherein the absolute interference is transmitted from the user equipment in a medium access control, MAC, layer accompanied by a PHR based on a power headroom report, PHR, report timing.

15. The base station of claim 11, wherein the residual interference is transmitted in a MAC layer from the user equipment accompanied by PHR based on PHR report timing.

16. The base station of claim 11, further comprises:

and a transmitting unit that transmits a trigger to the user equipment through downlink control signaling, wherein the residual interference is transmitted from the user equipment based on the trigger.

17. A method of wireless communication for a user equipment, comprising the following steps:

forming interference information about interference from at least one of the user equipment itself and at least one neighboring user equipment of the user equipment, wherein the interference information comprises residual interference from at least one of the user equipment itself and the at least one neighboring user equipment of the user equipment; and

Transmitting the interference information to a base station, wherein